Islam is a monotheistic religion based upon the Qur'an, which adherents believe was sent by God through Muhammad, as well as teachings of Muhammad recorded in the Hadith. Followers of Islam, known as Muslims (Arabic: مسلم), believe Muhammad to have been God's /Allah's final prophet.
Like Judaism and Christianity, Islam is considered an Abrahamic religion.With a total of approximately 1.4 billion adherents, Islam is the second-largest religion in the world.
Secular historians place Islam's beginnings during the late 7th century in Arabia. Under the leadership of Muhammad and his successors, Islam rapidly spread by religious conversion and military conquest.Today followers of Islam may be found throughout the world, particularly in the Middle East, North Africa, South Asia and Southeast Asia.
In Arabic, Islam derives from the triconsonantal root Sīn-Lām-Mīm, with a basic meaning of "to surrender". Islam is an abstract nominal derived from this root, and literally means "submission to 'The God' (Arabic:Allah)". Other Arabic words derived from the same root include:
-Salaam, meaning "peace", also part of a common salutation, assalamu alaikum ("peace be upon you").
-Muslim, an agentive noun meaning "one who submits [to God]".
-Salamah, meaning "safety", also used in the common farewell ma' as-salamah ("[go] with safety").
-Islam (with a short "a" vowel) also means "I submit".
Muslims believe that God revealed his direct word for humanity to Muhammad (c. 570–632) through the angel Gabriel and earlier prophets, including Adam, Noah, Abraham, Moses, and Jesus. Muslims believe that Muhammad is the last prophet, based on the Qur'anic phrase "Seal of the Prophets" and sayings of the prophet of Islam himself, and that his teachings for humanity will last until the Day of the Resurrection. Muslims assert that the main written record of revelation to humanity is the Qur'an, which is flawless, immutable, and which Muslims believe is the final revelation of God to humanity.
Muslims hold that Islam is the same belief as that of all the messengers sent by God to humanity since Adam, with the Qur'an, the text used by all sects of the Muslim faith, codifying the final revelation of God. Islamic texts depict Judaism and Christianity as prophetic successor traditions to the teachings of Abraham, and the Qur'an calls Jews and Christians (and sometimes people of other faiths) "People of the Book". However, Muslims believe that some people have distorted the word of God by deliberately altering words in meaning, form and placement in their respective holy texts, such as Jews changing the Torah and Christians the Injeel. This perceived distortion is known as tahrif, or tabdīl, meaning "alteration, substitution". This doctrine is accepted by most Muslims; some relatively small sects, such as Mu'tazili and Ismaili, as well as a few Islamic scholars and members of various liberal movements within Islam, reject the view that the Qur'an is a correction of Jewish and Christian scriptures
Fundamental Practices.
Islam is mainly based on five pillars;
1-Shahadah
The basic creed or tenet of Islam is found in the shahādatān ("two testimonies"): aڑhadu 'an lā ilāhā illā-llāhu; wa aڑhadu 'an muhammadun-r-rasūlu-llāh — "I bear witness that there is no God but Allah, and I bear witness that Muhammad is the messenger of Allah.As the most important pillar, this testament can be considered a foundation for all other beliefs and practices in Islam. Children are taught to recite and understand the shahadah as soon as they are able to do so. Muslims repeat the shahadah in prayer, and non-Muslims use the creed to formally convert to Islam.
2-Salat
Muslims perform five daily prayers throughout the day as a form of submission to God. The ritual combines specific movements and spiritual aspects, preceded by ablution. It is also supposed to serve as a reminder to do good and strive for greater causes
3-Sawm
Sawm, or fasting, is an obligatory act during the month of Ramadan. Muslims must abstain from food, drink, and sexual intercourse from dawn to dusk and are to be especially mindful of other sins that are prohibited. This activity is intended to allow Muslims to seek nearness to God as well remind them of the needy.
4-Chariety
Islam urges a Moslem to pay an yearly specific amount of her/his money as a donation to the poor people.2.5% of the annual income of an individual Moslem should be paid to contribute in reforming different aspects of social life.
5-Hajj
The Hajj is a pilgrimage that occurs during the month of Dhu al-Hijjah in the city of Mecca. The pilgrimage is required for all Muslims who are both physically and financially able to go and is to be done at least once in one's lifetime.
The holy book
Qur'an is the central religious text of Islam. It has also been called, in English, "the Koran" and (archaically) "the Alcoran." Qur'an is the currently preferred English transliteration of the Arabic original (قرآن); it means “recitation”. Although the Qur'an is referred to as a "book", when a Muslim refers to the Qur'an, they are referring to the actual text, the words, rather than the printed work itself.
Muslims believe that the Qur'an was revealed to the prophet Muhammad by God through the Angel Gabriel on numerous occasions between the years 610 and up till his death in 632. In addition to memorizing his revelations, his followers had written them down on parchments, stones, and leaves, to preserve the revelation.
Most Muslims regard paper copies of the Qur'an with veneration, washing as for prayers before reading the Qur'an. Old Qur'ans are not destroyed as wastepaper, but burned.
Most Muslims memorize at least some portion of the Qur'an in the original language (i.e. Arabic). Those who have memorized the entire Qur'an are known as hafiz (plural huffaz).
Muslims believe that the Qur'an is perfect only as revealed in the original Arabic. Translations were the result of human effort, the differences in human languages, and human fallibility, as well as lacking the inspired verses believers find in the Qur'an. Translations are therefore only commentaries on the Qur'an, or "interpretations of its meaning", not the Qur'an itself. Many modern, printed versions of the Qur'an feature the Arabic text on one page, and a vernacular translation on the facing page.
Islamic calendar
Islam dates from the Hijra, or migration from Mecca to Medina. Year 1, AH (Anno Hegira) corresponds to AD 622 or 622 CE, depending on the notation preferred (see Common Era). It is a lunar calendar, but differs from other such calendars (e.g. the Celtic calendar) in that it omits intercalary months, being synchronized only with lunations, but not with the solar year, resulting in years of either 354 or 355 days. Therefore, Islamic dates cannot be converted to the usual CE/AD dates simply by adding 622 years. Islamic holy days fall on fixed dates of the lunar calendar, which means that they occur in different seasons in different years in the Gregorian calendar
Denominations
There are a number of Islamic religious denominations, each of which have significant theological and legal differences from each other but possess similar essential beliefs. The major schools of thought are Sunni and Shi'a; Sufism is generally considered to be a mystical inflection of Islam rather than a distinct school. According to most sources, present estimates indicate that approximately 85% of the world's Muslims are Sunni and approximately 15% are Shi'a.
Sunni
The Sunni are the largest group in Islam. In Arabic, as-Sunnah literally means principle or path. Sunnis and Shi'a believe that Muhammad is a perfect example to follow, and that they must imitate the words and acts of Muhammad as accurately as possible. Because of this reason, the Hadith in which those words and acts are described are a main pillar of Sunni doctrine.
Sunnis recognize four major legal traditions (madhhabs): Maliki, Shafi'i, Hanafi, and Hanbali. All four accept the validity of the others and Muslims choose any one that he/she finds agreeable to his/her ideas. There are also several orthodox theological or philosophical traditions (kalam).
Shi'a
Shi'a Muslims, the second-largest branch, differ from the Sunni in rejecting the authority of the first three caliphs. They honor different accounts of Muhammad (hadith) and have their own legal traditions. Shi'a scholars have a larger authority than Sunni scholars and have greater room for interpretation. The concept of Imamah (leadership) plays a central role in Shi'a doctrine. Shi'a Muslims hold that leadership should not be passed down through a system such as the caliphate, but rather, descendants of Muhammad should be given this right as Imams.
Sufism
Sufism is a spiritual practice followed by both Sunni and Shi'a. Sufis generally feel that following Islamic law or jurisprudence (or fiqh) is only the first step on the path to perfect submission; they focus on the internal or more spiritual aspects of Islam, such as perfecting one's faith and fighting one's own ego (nafs). Most Sufi orders, or tariqas, can be classified as either Sunni or Shi'a. However, there are some that are not easily categorized as either Sunni or Shi'a, such as the Bektashi. Sufis are found throughout the Islamic world, from Senegal to Indonesia. Their innovative beliefs and actions often come under criticism from Wahhabis, who consider certain practices to be against the letter of Islamic law.